Forging apparatus



b- 2 1931} i-l. KUHLEMEIER ETAL I 1,793,933

FORGING APPARATUS Filed larch 14, 1930 mv'mrow (j G h d JZQKuhZcmcz'er "2 6) ar BY. 7% g A TTORNEY-S.

w s Feb. 24, 1931 UNITED "STATES PATENT OFFICE HEREANN KUHLEMETER. AND JAKOB GERI-IARD, OF NIEDERSCHELDEN-SIEG, GER- MANY, ASSIGNORS "10 THE FIRM VEREINIG'TE STAHLWERKE AKTIENGESELL- SCHAET, OF DUSSELDORF, GERMANY FORGING APPARATUS Application filed March 14, 1930, Serial No. 435,882, and in Germany March 4, 1929.

As is well known, forgings, whilst being acted upon by a press or hammer have to be continuously revolved and moved to and fro so as to have all their sides subjected to a pressing or hammering action in order to obtain a uniform density of texture all over the forging. Heretofore the said revolving and moving of the forgings on the bottom swage of the press or the hammer, as a rule, has been effected manually by means of a lever and was very troublesome. But worst of all, it caused very heavy working expenses since for carrying it out, a great amount of labour was required.

It has been proposed to effect the moving and revolving of the forgings automatically by means of an operative connection with the hammer or the press. However, all the mechanisms known at present, are more or less complicated and, above all, are only adapted for forging pieces of predetermined size and shape, whereas they are unsuitable for. forging stock of any desired size and cross section, since their parts necessary for carrying out the forging operation have to be'adapted to suit the respective requirements, with the, result that the said parts had to be successively exchanged according to changed con-' ditions, which renders sucha procedure troublesome and, above all, expensive. From the foregoing it will be understood that such mechanisms may only be used in connection with the forging of a predetermined kind of stock having the same size and cross section, whereas they are unsuitable for doin heavy forging of the type wherein stock 0 widely 'diifering size: and cross section is being forged, and it is a prime desideratum to effect the revolving and moving of the pieces with ease and in rapid succession by means of a simple mechanism.

It is the object of the present invention'to provide a mechanism capable of successfully meeting the said requirements inasmuch as by means of the new mechanism, forgings of any desired size and cross section may be revolved and moved to and fro without the necessity of exchanging any parts during the forging operation, the individual parts being of simple construction, and reliable in operation so as to guarantee satisfactory working conditions. 7 p

This is bein accomplished, according to the invention, y arranging a lever at both sides of the hammer or the press, one end of which engages the stock from underneath whereas the other end gets imparted an elliptic motion. The elliptic motion of one end of the levers engaging the forging from underneath being effected by means of rods pivotally connected to a crank-disc, the levers eing linked to the said rods.

The operation of the mechanism proceeds in such a way that the operator controlling the hammer also controls the mechanism, so

that only a small number of helpers will be necessary for forging even the largest pieces whereby the working costs will be considerably reduced.

According to the invention a hand lever is linked to each of the levers engaging the stock from underneath whose pivot is supported helper.

In forging square stock which, in the first line, requires lateral movements of the pieces, the drive through the disc is set idle. For this purpose the suspension is adapted to be raised and lowered.- In the annexed drawing. one embodiment of the invention is shown.

Fig. 1 is a side view and F Fig. 2 a sectional view on line 22 of Z is the forging lever which by means of its spoon-shaped end 79 engages the forging 0 from underneath, and lifts and revolves it. This lever a is pivotally connected to the rods e at d, the latter being-connected at f to a power driven 'disc g. By the rotation of disc 9 the end of the fork a gets imparted an elliptic motion causing the spoon-shaped end I) of the lever a to raise and revolve the forging.

In order to secure an accurate control of the revolving of the stock a each lever a is connected at h to a hand lever *2 by means of a member In, the pivot l of the lever 2' being supported in well known manner by a freely movable suspension m. B the provision of this additional leverage it 1s made possible to raise and lower the lever a according to requirements with a relatively small amount of labor, in order to regulate in this way the revolving of the forging whilst the mechanism is in operation. Besides, the additional lever 2' allows the forging to be moved laterally by the smith or a helper, this lateral movement may also be effected very efficient- By means of the above described mechanism, the revolving and moving particularly of round stock may be effected in a simpleand satisfactory manner. If it is desired to forge square stock by means of the new mechanism, the drive through the disc 9 is set idle, since in this case the forgings will have to be moved chiefly in lateral direction. To meet this requirement the suspension m is arranged to be raised and lowered.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. The combination with a forgin hammer and its die, of a pair of levers aving spoon-shapede'nds' upon their inner extremities for engaging a forging on the die, a power driven disk, a link assembly connecting the ,disk and outer ends of the levers for imparting to the outer ends thereof a movement in an elliptical path.

2. The combination with a forging hammer and its die, of a pair of levers having their v inner ends adapted to engage a forging on the die, a link assembly connected with the outer ends of the levers, means for actuating the link assembly for imparting to the outer ends of the levers a movement in an elliptical path,

a hand lever pivotally connected with each of said levers, and means for flexibly suspending said hand levers, as and for the purpose set forth.

3. The combination with a forging hammer and its die, of a pair of levers having their inner-ends adapted to engage a forging on the die, a link assembly carried at the outer ends of the levers, means for operating the-link assembly to impart tothe outer ends of the levers a movement in an elliptical path, each lever having a hand lever connected therewith, means for flexibly suspending said hand levers, said sus ension means being adjustable as and for t e purpose set forth. 7 v

HERMANN KUHLEMEIER.

J AKOB GERHARD. 

